1 files changed, 51 insertions, 0 deletions
diff --git a/dev-lang/python/files/python-3.2-CVE-2013-2099.patch b/dev-lang/python/files/python-3.2-CVE-2013-2099.patch
new file mode 100644
index 000000000000..9055a03dfc89
--- /dev/null
+++ b/dev-lang/python/files/python-3.2-CVE-2013-2099.patch
@@ -0,0 +1,51 @@
+# HG changeset patch
+# User Antoine Pitrou <solipsis@pitrou.net>
+# Date 1368892602 -7200
+#      Sat May 18 17:56:42 2013 +0200
+# Branch 3.2
+# Node ID b9b521efeba385af0142988899a55de1c1c805c7
+# Parent  6255b40c6a6127933d8ea7a2b9de200f5a0e6154
+Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of service using certificates with many wildcards (CVE-2013-2099).
+
+diff --git a/Lib/ssl.py b/Lib/ssl.py
+--- a/Lib/ssl.py
++++ b/Lib/ssl.py
+@@ -108,9 +108,16 @@
+     pass
+ 
+ 
+-def _dnsname_to_pat(dn):
++def _dnsname_to_pat(dn, max_wildcards=1):
+     pats = []
+     for frag in dn.split(r'.'):
++        if frag.count('*') > max_wildcards:
++            # Issue #17980: avoid denials of service by refusing more
++            # than one wildcard per fragment.  A survery of established
++            # policy among SSL implementations showed it to be a
++            # reasonable choice.
++            raise CertificateError(
++                "too many wildcards in certificate DNS name: " + repr(dn))
+         if frag == '*':
+             # When '*' is a fragment by itself, it matches a non-empty dotless
+             # fragment.
+diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
+--- a/Lib/test/test_ssl.py
++++ b/Lib/test/test_ssl.py
+@@ -326,6 +326,17 @@
+         self.assertRaises(ValueError, ssl.match_hostname, None, 'example.com')
+         self.assertRaises(ValueError, ssl.match_hostname, {}, 'example.com')
+ 
++        # Issue #17980: avoid denials of service by refusing more than one
++        # wildcard per fragment.
++        cert = {'subject': ((('commonName', 'a*b.com'),),)}
++        ok(cert, 'axxb.com')
++        cert = {'subject': ((('commonName', 'a*b.co*'),),)}
++        ok(cert, 'axxb.com')
++        cert = {'subject': ((('commonName', 'a*b*.com'),),)}
++        with self.assertRaises(ssl.CertificateError) as cm:
++            ssl.match_hostname(cert, 'axxbxxc.com')
++        self.assertIn("too many wildcards", str(cm.exception))
++
+     def test_server_side(self):
+         # server_hostname doesn't work for server sockets
+         ctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)